How do you find yourself again at age 40?

I turn 40 in two months. I’ve been feeling a bit lost for at least a year now. Like, my previous varied hobbies are no longer interesting (climbing, knitting, videos games, etc.). Life was chaotic with some major home remodeling, me finishing grad school, and then we got a puppy. Now things are settling into a more reliable routine but there's nothing that..is a spark.

I have a husband and a teen who are great and we all like each other, but everyone is busy with their own stuff so our time together feels sparse.

I'm not sure what makes me myself any more. I feel simultaneously so busy and so bored. Evening and weekends are both a flurry of taking care of all the things but then also just doom scrolling until it’s an acceptable time to go to bed.

Is this a common experience around this age? I feel like I’m in the best mental state I’ve ever been in—no anxiety, no irrational sads. How do I…find myself again I guess?